Assistance, independent counseling, professional sparring and teachings related to:

-  Operations and operations management.

- R&D projects related to biogas, biomass (sludge), surface water and wastewater.

- Biological, chemical, mechanical and thermal processes utilized for cleaning, handling, and producing biogas, biomass, surface water and wastewater. 

- Dialog and collaboration between authorities, municipalities and water company. 

Analysis of:

- Process and operational issues, optimization and energy saving.

-- Biological chemical, mechanical and thermal processes for cleaning, handling, and producing biogas, biomass, surface and wastewater.

- Wastewater composition and possible consequenses on the recieving wastewater treatment plant (WWTP).

The competence base

Biological, chemical, mechanical and thermal processes for handling, producing and treating, Biogas, biomass (sludge) and wastewater.

- M. Eng., Environmental Technology, DTU.

- 20 years with operations and analysis of biogas, biomass and wastwater handling, production and treatment.

Operations, people and project Management

- Operations manager, Wastewater systems, COK.

- Additional management courses and training

-  12 years as operations and people manage. Responsible for operations and maintenance  of plants for biogas production, biomass handling and wastewater treatment. Working environment, Health and Safety of operators and technicians., maintenance. And for handling accidents, extreme weather and pollution incindents, collaboration, dialog with and reporting to local and national authorities. 

 - Constructions and R&D projects, often in collaboration with consulants and/or research and educational institues

- Teachings on:

Handling of wastewater, sludge and biogas,

On biological, chemical and mechanical processes to operators and technicians.

On legislations, operational finance, collaboration, dialog with and reporting to authorities and owner municipality, to administrative and political leaders.

Thomas H. Eriksson. Tel: +45 61 78 47 64, E-mail: the(a)

Previous projects

Faxe Forsyning A/S (Utilities) - Analysis of lye consumption

Analysis of the consumption and distribution of lye, for pH adjustment prior to biogas production 

Mass balances, clarifier and RAS control

Teaching of operators on sludge mass balances, clarifier operation and return sludge control with fokus on optimizing N and DN processes, reduced energy consumption amd increased hydralic capability.


Diversion of 3 wastewater treatment plants to a central plant

Proces and technical analysis of diverting 3 active sludge wastewater plants to a centralplant and calculations of necessary expansions and adaptations on the recieving plant


Diversion, or conversion of an old and small active sludge treatment plant.

Process and technical analysis of diverting a small and worn active sludge treatment plant , to a neighbor plant, or converting it into a rootzone plant.


Centralized sludge treatment

Proces, technical and economical analysis of centralized treatment of excess sludge, from 20 small wastewater treatments plants, on two central plants.

Energy neutrality

- Assessment and calculations on how to adapt a traditional  125,000 PE active sludge treatment plant to become energy neutral or producing and describing the necessary adaptations.

Gasification or pyrolysis

- Assessment of the energy potential, technical and operational pros and cons by implementing thermal gasification or pyrolysis for excess sludge and waste disposal on wastewater treatment works.

Assessment of the pro's and con's by implementing a biogasmotor

- Assessment and calculations of the possible energy production, heat and sludge balances and generel pros and cons by implementing a biogasmotor to thermophile excess sludge digestors.

Improved excess sludge thickening

- Adaptations of the excess sludge thickening proces, prior to thermophilic digestiors. The adapations reduced polymer consumption with more than 90%, stabilized the thickening proces and increased biogas production by 10%.

Surface or subsurface aeration

Assessment and calculation of the potential energy savings and operational  pros and cons by replacing surface airation to subsurface airation on an active sludge treatment plant.

A shift from surface to subsurface aeration will, with out any doubt reduce energy consumption, as subsurface aeration is more energy efficient. But maintenance costs may increase severely, compared to easy accessible surface aerators. Acces to diffusors are more difficult and may require external assitance and mechanical aid for example cranes and a shutdown of the current procesline.

The elasticity of diffusor membranes  decreases over time due to age and chemical precipitations. Reduced diffusor elasticity wil quickly lead to a decrease in energy effeciency and increased energy consumption.

Improved filtration of treated wastewater for proces water

Improved filtration of treated wastewater for proces water. The adaptations stabilized and improved sludge handling operations and reduced operational break downs.